For how long must the Contractor maintain records after final payment?

The requirement for the Contractor to maintain records for a period of not less than five years after final payment is crucial for ensuring accountability and transparency in construction projects. This extended retention period allows for proper documentation in case of audits, disputes, or inquiries that may arise after the project is completed.

Maintaining records for five years also aligns with common legal and regulatory standards in the industry. It ensures that all relevant documentation related to the project, including contracts, invoices, and correspondence, is available for review. This can serve to protect both the Contractor and the client by providing a comprehensive history of the project, which can be vital in resolving any potential issues that may surface after the project's conclusion.

The other durations mentioned, such as forever, one year, or until the next project begins, do not adequately meet the needs for thorough record-keeping that could be necessary for future reference, verification, or legal purposes. Therefore, the requirement for five years stands out as the most appropriate and responsible choice.